.box {
    margin: 100px auto;
    width: 432px;
}

.form_input {
    margin-bottom: 20px;
}

.f_right {
    float: right;
}

.login_error {
    color: red;
}

a {
    padding-top: 6px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}